Aircrack-ng

Overview

Aircrack-ng is the reference suite for 802.11 security auditing. It captures wireless frames in monitor mode, extracts WPA/WPA2 4-way handshakes, and performs offline dictionary attacks against the captured handshake. The suite is airmon-ng (monitor mode), airodump-ng (capture), aireplay-ng (injection/deauth), and aircrack-ng (offline crack). Use exclusively on networks you own or have written permission to audit.

Instructions

Step 1: Put the Adapter in Monitor Mode

# Check which adapters support monitor mode and injection
sudo airmon-ng
# PHY     Interface       Driver          Chipset
# phy0    wlan0           ath9k_htc       Atheros AR9271

# Kill processes that interfere with monitor mode
sudo airmon-ng check kill